Not every woman is attracted to eroticism

Most girls probably read romantic stories but not everyone is comfortable with the more explicitly sexual nature of erotic stories, which help a woman develop the sexual fantasies that lead to orgasm. Our sexual fantasies represent the aspects of sex that we find most arousing and hence most taboo.
“Although every child learns that pretending is an important type of play, sexual fantasies after childhood are usually not thought of as playful. This attitude may exist because sex is usually regarded as a serious matter, even in the imagination. Furthermore, some religious traditions regard a thought as equivalent to an act; thus, a person who has ‘immoral’ sexual daydreams or desires is as sinful as a person who acts on those impulses.” (p413 Human Sexuality (fifth edition) 1995)
Women have more conscious choice over their sexual arousal
Men might feel embarrassed (or they might not!) as they head off to buy their pornographic magazines. Their regular need to release sexual frustration through orgasm is such that men do not have the luxury of deciding to be ‘pure’. Women’s sexual arousal and orgasm is not automatic as a man’s tends to be and so women have to learn how to orgasm.
Women are not attracted to eroticism as easily as men on average (in fact the majority of women find almost any form of eroticism objectionable). Equally a woman has much more conscious control over the extent to which she allows herself to indulge in the erotic thoughts that might lead to enjoying orgasm. Since female masturbation is relatively uncommon many women never discover orgasm and do not necessarily even have hopes for enjoying sexual pleasure with a lover.
“ … fantasy and sexual desire often merge together. People with low levels of sexual desire typically have few sexual fantasies…” (p415 Human Sexuality (fifth edition) 1995)
A good-looking and successful guy in his mid-forties, was very popular with the ladies. Ironically, he was always hoping for a long-term partner but so far had only managed serial relationships (some lasting months and some years). He told me that not one of the women he had been with over the years had been open to the idea of watching porn movies.
Many women never discover orgasm through masturbation and hence never know what they are missing. Having enjoyed orgasm throughout my adult life, it is definitely an experience I would not want to have missed but I can quite see why many women are happy to do without.
“For most women orgasm does not have this central role in life. And if it does, it tends to be for a small part of their lives, and often to melt into the background against other significant experiences and other expressions of their sexuality.” (p80 Woman’s Experience of Sex 1983)